Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) requiring stereochemical control. Its protected amine and carboxylic acid functionalities make it ideal for peptide coupling and heterocycle formation. Commonly employed in the preparation of pyrrolidine-based drugs, including those targeting central nervous system disorders and protease inhibitors. The Boc group allows for selective deprotection under mild acidic conditions, enabling stepwise assembly in complex molecule synthesis. Widely utilized in medicinal chemistry for structure-activity relationship (SAR) studies due to its conformational rigidity and ability to mimic proline-like structures.